Subject: Re: [xsl] Confusion with generated xsl From: "Michael Kay mike@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Mon, 21 May 2018 15:18:49 -0000 |
> Just one more question, is there any xsl or xpath construct that can't be > generated using xslt? > That's a challenging one! There are a few XML constructs that can't be generated using XSLT (for example DTDs, entity references, arbitrary CDATA sections); the only construct in the untyped XDM data model that can't be generated, as far as I'm aware, is an unparsed entity. When it comes to typed nodes the situation is a bit more complex, but that's not relevant here. But although those constructs can appear in XSLT stylesheets they have no semantic function when they do so, so I think it's fair to say you can generate any XSLT stylesheet. I'm assuming XSLT 2.0+ here. There are limitations in XSLT 1.0 concerning namespaces: you have (in theory) no control over the processor's choice of namespaces prefixes in XSLT 1.0, so you can't safely generate constructs like select="system-property('xsl:version')", unless the processor generates the prefixes you would instinctively expect, which of course most processors do. XPath expressions are just character strings and you can certainly construct any character string. Michael Kay Saxonica
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